Driving-gearing for well-drilling apparatus.



C. F. R|GBY.

DRIVING GEARING FOR WELl DRILLING APPARATUS.

APPLICATlON FILED MAY 14, 1913- Patented Oct. 19, 1915.

2 SHEETS-SHEET I.

I 1 15mm.

C. F. RIGBY.

DRIVING GEARING FOR WELL DRILLING APPARATUS.

APPLICATION FILED MAY I4. 1913.

2 SHEETSSHEET 2.

i T 1111 1 IIIAIIAIlII I h I hf/ HIJ.

mart an snares arranr CLARK F. RIGrBY, OF BUTLER, PENNSYLVANIA.

DEIVING-GEARING FOR WELL-DRILLING APPARATUS.

Application filed May 14, 1913.

T 0 all whom it may concern Be it known that l, CLARK F. RIGBY, acitizen of the United States and resident of Butler, in the county ofButler and State of Pennsylvania, have invented certain new and usefulImprovements in Drix ing-Gearing for ell-Drilling Apparatus, of whichthe following is a specification.

One object of this invention is to provide simple and efficient meansfor reversing a wire cable belt drive without stopping or in any mannerdisturbing or interrupting the belt driving mechanism.

A further object is to provide against the slipping of a belt when greatstrain is exerted on the belt driven part, this regardless of whethersuch stress is in opposition to the driving force of the belt or in a reverse direction.

Still a further purpose is to facilitate the adjustment of slack in thebelt.

Another and very important feature of the invention is the arrangementof belt gearing directly on the crank shaft of an engine, andparticularly an explosive engine, whereby the power is directlytransmitted, with means for reversing the direction of the transmittedpower without interfering with the operation of the engine.

In the accompanying drawings, Figure 1 is a side elevation of theimproved mechanism, and Fig. 2 isa top plan of the same. Fig. 3 is asectional plan of the reversing mechanism mounted on the engine crankshaft, and Fig. 4c is a sectional elevation on line l-4 of Fig. 3.

The improved mechanism is designed primarily for use with well drillingapparatus, and such an adaptation is shown in the drawings, although itwill be understood that it may be applied to other uses withoutdeparting from the invention.

Referring to the drawings, 2 designates an explosive engine and 3 thecrank shaft thereof which is connected to the engine piston or pitman 4.in the usual manner, shaft 3 carrying the combined fly wheels and clutchheads The crank shaft is mounted in the engine frame 6, and secured toopposite sides of the latter in the plane of the shaft are thewedge-like abutments 7 Rotatable and slidable on the shaft are sheaves8, and carried by the sheaves are clutch disks 9 which Specification ofLetters Patent.

Patented Get. 1%, 1915.

Serial No. 767,605.

are adapted to engage the combined fly wheels and clutch heads 5.

Embracing shaft 3 between sheaves 8 and abutments 7 are the bifurcatedwedges 11, each carried by an arm 11" and these arms are pivoted toopposite ends of the lever 12, the latter being fulcrumcd between itsends at 13 to the transverse frame part 1 1 which connects abutments 7.Lever 12 is connected by rod 15 with the hand adjusting lever 16. Withthe mechanism thus described either driving sheave may be clutched tothe engine and the driving direction of cable 18 extending around thesheaves thus determined, the unclutched sheave simply serving as anidler. The cable is passed from one she ve to the other by means ofidler 19 pr vided with a vertical journal 20 which is supported by abracket 21 projecting from frame part 141, being adjustable in saidbracket by means of screw 22.

The mechanism driven by the belt consists of a band wheel 25 which ishere shown mounted on shaft 26 of well drilling mechanism, the shaftbeing provided with the usual crank 27 for imparting motion to a walkingbeam or other tool operating mechanism, not shown. The periphery of theband wheel is formed with two parallel grooves 28 to provide foraccommodating a double winding of belt 18, the latter being preferably awire rope. For shifting the belt from one groove to the other of theband wheel it is caused to pass around an idler 29 which has a swivelsupport 30 in a post 31, so that the idler may assume the anglenecessary for shifting the belt. The idler post 81 is preferably locatedbetween the band wheel and the engine and is pivotally supported at itslower end at 32 and is ad justably held by the turnbuckle stay 33, thelatter affording convenient means for adjusting the idler as may benecessary for properly directing the belt, also for taking up slack.

The invention is peculiarly well adapted for utilizing wire cable as adriving belt, danger of slipping being reduced to aminimum.

The advantages of the invention reside in the facility with which powerin reverse directions may be applied directly from an engine, andparticularly a non-reversible engine, also in the non-slipping hold ofthe belt, this regardless of the stress that may be placed. thereon.Hence in well drilling operations, with the belt properly adjusted,thereis no danger of slipping when elevating the tools, nor when therotation of the crank shaft is accelerated by the down stroke of thetools, and such movement is equally impossible when the rotation of thecrank shaftis accelerated bythe down stroke of the tools. 7 'I claimr 1. The combination of an explosive engine cylinder and piston, a crankshaft, a pair of fly-Wheels secured to the shaft, a pitman locatedintermediate the fly-wheels and oper atively connecting the piston andsaid crank shaft, two sheaves normally loose on the shaft, a' set ofclutch members for each sheave with one member of each set rigid.

with the sheave and the other member rigid with arfly-wheel, and meansfor uniting the clutch members of each set.

2; The combination of an explosive engine and a crank-shaft therefor,.fiy wheels on the shaft, two sheaves normally loose on the shaft, a setof clutch members for each sheave with one member of each set rigid withthe sheave and the other member rigid with a fly wheel, and means foruniting the clutch members of each set.

3. The combination of an explosive engine and a crank-shaft therefor,fly wheels secured to the shaft and formed with clutch faces, twosheaves normally loose on the shaft, a clutch member rigid with eachsheave and adapted to cooperate with the clutch face of a fly wheel, andmeans for effecting such cooperation.

4. The combination of a driving shaft, two driving sheaves normallyrotatable on the shaft, a set of clutch members for each sheave with onemember of each set secured to a sheave and the other member secured tothe shaft, wedges for moving the sheaves on the shaft for engaging thesheavc-carried clutch members with the shaft-carried clutch members, alever to which the wedges are connected, and lever operating means.

In testimony whereof I affix my signature in presence of two witnesses.

CLARK F. RIGBY.

lVitnesses J. M. Nnsnrr, ELLA McCoNNnLL.

I Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents.

Washington, D. C.

